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block: throttle-groups: Use BlockBackend pointers internally

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As a first step towards moving I/O throttling to the BlockBackend level,
this patch changes all pointers in struct ThrottleGroup from referencing
a BlockDriverState to referencing a BlockBackend.

This change is valid because we made sure that throttling can only be
enabled on BDSes which have a BB attached.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2016-03-21 11:30:57 +01:00
parent f2cd875d54
commit 31dce3ccca
6 changed files with 83 additions and 78 deletions
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include/block/block_int.h
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@ -435,7 +435,6 @@ struct BlockDriverState {
ThrottleState *throttle_state;
ThrottleTimers throttle_timers;
unsigned pending_reqs[2];
QLIST_ENTRY(BlockDriverState) round_robin;
/* Offset after the highest byte written to */
uint64_t wr_highest_offset;